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Fishing Reports

Fly Fish Food Jimmy's / Fishing Reports

Still Waters, April 12th, 2024

Mackay Reservoir is free of ice and open to fishing. Daniels Reservoir is also open to fishing but access must be made by going through Malad City then north because the Dairy Creek Road is yet to open. Hawkins Reservoir is also open to fishing. We have little information on fishing success in all these waters except for Springfield Reservoir in which fish are responding to midge activity when the taking depth is found. Nymph and fly rod jigs can also bring some fishing success there.

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Henry’s Fork, April 12th, 2024

The information below reveals that run-off has begun only in the Teton River drainage and is reflected by around or slightly more than normal flows in the lower river down to the Teton River confluence. It also suggests that the next few days will offer the most comfortable times to enjoy trout responding to BWO, March brown, and midge activity.

Rob Van Kirk, Ph.D.

Details From Dr. Rob Van Kirk’s SWE Report Filed Yesterday, April 11th, 2024

Snow melt increased natural flow in the Teton River yesterday (120%) while flow in the Fall River 76% 0f normal and 78% of normal in the Henry’s fork..These amounts will increase until Monday when cooler atmospheric temperatures will begin to take place for several days.

Senior Scientist

Henry’s Fork Foundation

P.O. Box 550

Ashton, ID 83420

208-881-3407 CELL

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Henry’s Lake, April 12th, 2024

Nate Tillotson, fisheries biologist for the IDF&G’s Upper Snake River Region gave a superb meeting on Henry’s Lake fishery status last Wednesday evening. The public meeting at the Fairfield Inn and Suites, open to the public, was sponsored by the Snake River Cutthroats club resulted in many attendees. Nate’s presentation featured good and bad news, too much to totally describe here, but we will offer a few highlights from what Nate and his crew determined.

First, the bad news. Recently there are fewer, but larger than average fish ( cutthroat average 16.7 inches in length, hybrids 20.6 inches, and brookies 12.5 inches ) in the lake. Slim fishing success is upcoming in the lake for the next few years because hatchery and wild cutthroat ( only 9% occurs in tributaries) spawning has been lower than normal for the last several years, and summertime water temperatures have not been ideal. Now the good news. Ice fishing appears not to impact trout population in the lake. Nate expects that this will be a great year for fishing the lake because the 2017 cutthroat spawn was very good and the result should be a better number of and larger on the average of mature fish than recent years. Tributaries ( mostly Targhee and some of Howard Creeks) are being studied to determine what needs to be done to offer increased wild cutthroat spawning ( hybrid trout and brookies in the lake are sterile). Recently a few brown trout have been caught in the lake, but the source of these ( adjacent private ponds) have been discovered and hosted browns are being or will be eradicated. Water quality studies are beginning to reveal conditions that impact fish population.

So this is the best chance in recent years for fishing success and perhaps catching the ” cutthroat trout of a lifetime” from Henry’s Lake

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South Fork, April 12th, 2024

The rate of flow increase out of Palisades Reservoir has slowed temporarily (10400 cfs at Irwin,11400 cfs at Heise, 8400 cfs at Lorenzo), but as we warm up it will increase to make room for run-off . Much of the reason is concern for down stream flooding resulting from near future run-off and that American Falls Reservoir is at full capacity. This water management activity has a negative impact on fishing in the South Fork and also on the main stem Snake River down to American Falls Reservoir. Husky, Conant, Spring Creek,, Byington, and Lorenzo launch facilities are fully open. Better days are sure to come—Be patient!

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Main Stem Snake River, April 6th, 2024

Because of the increasing flow out of Palisades Dam the Snake River is much higher than normal for this time of the season. This condition will continue well into the irrigation season and makes presenting large streamer patterns the best option for fly fishing success during this time. The same applies to the river below American Falls Dam.

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South Fork, April 6th, 2024

As expected, flow out of Palisades Dam has been increased ( now about 7700 cfs at Irwin, 8200 cfs at Heise, and 5500 cfs at Lorenzo) and will continue to do so for the coming weeks. Water coming out of the reservoir is clear and cold, but on moving downstream, run-off from tributaries is clouding it to some degree. Streamer, rubber leg and woolly bugger type patterns presented at heads of runs and holes, and deeper side channels provide best chances for fishing success. Where you can find access, the Dry Bed has some good midge hatches on going.

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Henry’s Lake, April 6th, 2024

Nate Tillotson, Upper Snake River Region, IDF&G, assigned to Henry’s Lake will be the guest speaker at the Snake River Cutthroats public meeting, 6;30 PM, Wednesday, April 10th at the Fairbridge Inn & Suites, 850 Lindsay Blvd, Idaho Falls. Nate will provide information on fishery status for the lake and statistical projections for its fishery. The public is invited to attend and to bring questions regarding fishing on this most popular lake.

BTW: Have you gone to the Henry’s Lake Foundation Web Site to contribute to the public survey ?

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Henry’s Fork, April 6th, 2004

Cloudy skies are great for increasing the density of BWO, March Brown, and midge activity. But the stronger the wind the bigger the negative impact on these activities. That wind is happening now on the lower river, making evenings and early AMs the best times to enjoy fish responding to these activities. Improved weather is predicted for later next week, but be aware we are entering the run-off season as warm weather begins to dominate. If you are fishing streamers, the only impact wind has is on casting precision!

Headlines 4/5 From Dr. Rob Van Kirk’s SWE Report Filed April 5th for the Henry’s Fork Drainage

  • The last four days were warm and dry, dropping water-year precipitation to 103% of average and melting over 0.5 inch of SWE from Sunday’s peak.
  • Natural stream flow has increased by 15% since Sunday due to snow melt and is 95% of average.
  • After a few days of showers and cooler temperatures, very warm, dry weather is expected next week.
  • The upper Snake River reservoir system is 90% full, compared with 71% full on average.

Details

Dry conditions are expected for 7–10 days starting early next week. That will initiate widespread melt of snow at all but the very highest elevations.

Natural stream flow has increased by over 15% since Sunday due to snow melt. Natural flow was 95% of average yesterday: 90% in upper Henry’s Fork, 97% in Fall River, and 104% in Teton River. I expect natural flow to continue to increase through tonight before cooler temperatures slow melt and drop stream flow over the weekend.

Rob Van Kirk, Ph.D.

Senior Scientist

Henry’s Fork Foundation

P.O. Box 550

Ashton, ID 83420

208-881-3407 CELL

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Salmon River, April 6th, 2024

Here is the Upper Salmon River steelhead fishing report for April 4th. The data included in this report was collected between Monday, March 24 and Sunday, March 31, 2024.

Angler effort continued to shift more upriver last week. Angler effort was very low in the areas downstream of Salmon, ID, while it remained high in the areas upstream of Challis, ID, especially upstream of the East Fork in location code 19. Angler effort near the mouth of the Pahsimeroi River remained steady but was lower than what was observed two weeks ago.

Average catch rates were excellent upstream of the East Fork, while they continued to decline in the downstream areas. Anglers interviewed downstream of Salmon, ID in location codes 14, 15, and 16 did not report catching any steelhead, and anglers interviewed downstream of the Pahsimeroi River in location code 17 averaged 45 hours per steelhead caught. Anglers interviewed downstream of the East Fork in location code 18 averaged 15 hours per steelhead caught, and anglers interviewed upstream of the East Fork in location code 19 averaged 3 hours per steelhead caught, which was the best average catch rate observed so far this spring.

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